Hiporfin-photodynamic therapy for high-grade squamous intraepithelial lesions of the endocervical canal in young women.

The objective of this prospective study was to assess the efficacy of Hiporfin-photodynamic therapy (PDT) int the treatment of young women diagnosed with high-grade squamous intraepithelial lesions (HSIL) of the endocervical canal. This study included 14 patients aged 30 ± 4.2 years (range 21-37) with HSIL of the cervical canal, treated at our hospital from August 2021 to June 2023. Hiporfin (2 mg/kg) was administered intravenously and laser irradiation with a 630 nm wavelength was performed on the cervical canal and cervical surface 48-72 h later. All patients had been observed for at least 12 months. 64.3% (9/14) were nulliparous. The complete response (CR) rate of cervical canal involvement was 100.0% (14/14) at 3-6 months. Pre-PDT, all patients (14/14) tested positive for high-risk human papilloma virus (HR-HPV). The HPV eradication rate was 64.3% (9/14) at 3-6 months and 85.7% (12/14) at 12 months. No serious adverse effects were observed in patients during or after PDT. No recurrence was noted during the long-time follow-up. 6 patients who planned to get pregnant achieved 6 pregnancies including 1 spontaneous abortion, 2 term pregnancies, and 3 ongoing pregnancies. No fetal loss occurred due to cervical incompetence. Hiporfin-PDT may be a promising, fertility-preserving treatment for HSIL of the endocervical canal in young women.